gutmann



No. 627,II4. Pafented 1m 20, I899. J. aummm, E. FALLEB & K. MISCHKE.

BUTTONHOLE SEWING MACHINE.

(Application filed Aug. 31, 1897.)

m fl 3 Sheets-Shoe! l.

(No Model.)

606 102 sses: WM,

V Patented June 20, I899. J. GUTMANN, E. FALLER & K. MISCHKE.

BUTTONHOLE SEWING MACHINE.

(Applicaticn filed Aug. 31, 1897.)

8 Sheets-8heet 2.

(No Model.)

W m h w Patentd June 20, I899. SCHKE.

J. GUTMANN, E. FALLER & K. Ml

BUTTOHHULE SEWING MACHINE.

8 Sheets-Sheet 3.

(Application filed Aug. 31, 1897.)

(No Model.)

I lmcni'ozi wifnesses N0. fi27,li4. Patented June 20, I899.

J. GUTMANN, E. FALLER &. K. MISCHKE. BUTTONHOLE SEWING MACHINE.

(Application filed Aug. 31, 1897.) (No Model.) B Sheets8heet 6.

"lllll llllllll Wizemwe;

WWW

"m: ucmms PETERS ca, PuoYoLgfnnv. wgsummon, u. c

N0. 627,ll4. Patented June 20, I899. J. GUTMANN, E FALLER & K. MISCHKE.

BUTTONHOLE SEWING MACHINE.

(Application filed Aug. 31, 1897.)

(No Model.) 8 Sheets-Sheet 7.

lm'enzard,

WM @MWM m.

m: mums Prrzna co.. more-mun, msnmui-om a. c.

No. 627,l|4. Patented lune 20, I899. J. GUTMANN, E. FALLER & K. MISCHKE. BUTTUNHOLE SEWING MACHINE.

(Application filsd Aug. 31, 1897.)

(No Model.) 8 Sheets-Sheet 8.

I nn

II 'II umm l ai UNITE STATES PATE T OFFICE.

JULIUS GUTMANN, OF BERLIN, GERMANY, AND EMIL FALLER AND KARL MISCHKE, OF ZURICH, SIVITZERLAND, ASSIGNORS TO THE FIRMA FABRIK FUR SPEZIALNAHMASOHINEN ACTIEN-GESEIILSOHAFT, (PATENTE JULIUS GUTMANN,) OF ZURICH, SWITZERLAND.

BUTTONHOLE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 627,114, dated. June so, 1899.

Application filed August 31,1397. 1 semi No. 650,162. No model.

To all whom it may concern.-

Be it known that we, JULIUS GUTMANN, residing at Berlin, Germany, and EMIL FALLER and KARL MISCHKE, residing at Zurich, Switzerland, have invented certain new and useful Improvements in Buttonhole-Sewing Ma:

chines; and we do hereby declare the following to be a full, clear, and exact description of the invention, reference being had to the accompanying drawings, and to letters and figures of reference marked thereon, which form a part of this specification.

Our present invention has relation to buttonhole-sewing machines of the Gutmann type organized to bind the edges of a buttonhole in the usual manner and bar the ends there of by stitches laid parallel with said edges or substantially so.

Our said invention has for its object certain 2o improvements on the machine shown and described in Letters Patent of the United States to Julius Gutmann, dated November 29, 1898, No. 615,165, whereby certain parts of the mechanism are materially simplified, as will hereinafter be more specifically pointed out. In the accompanying drawings, Figure 1 is side elevation of a buttonhole-sewing machine organized substantially like the machine shown and described in the application for patent referred to and embodying our im- Figs. 2 and 3 are under side provements. views of the bed-plate, the feed-wheel being removedin Fig. 3. Figs. 4c and 5 are longitudinal vertical and transverse sectional views, respectively, of a portion of the bed-plate and feed mechanism. Fig. 5 is a stitch diagram. Fig. 6 is a top plan View of the feed-wheel. Fig. 7 is a cross-section thereof on line 00.20 of Fig. 6. Fig. 8 is a top plan View of the feedwheel, the cam-disk 0 being removed. Fig.

9 is an under side view, and Fig. 10 a crosssection, of said disk 0 Figs. 11 to 15, inclu sive, show a modified and preferred construction of the feed-wheel, Fig. 11 being a top plan view and Fig. 12 a section on line z 20f.

Fig. 11 of said wheel. Fig. 13 is a top plan view of the feed-wheel with the cam-diskremoved. Fig. 14 is "a like view of the camstop its vibrations.

disk detached, and Fig. 15 is a cross=section thereof. I

As shown in the aforementioned patent,the work-holder holds the work with the buttonhole lengthwise of the bed-plate, the needle? barin bindingabuttonholeedge reciprocating vertically andvibrat-ing crosswise of the buttonhole,while said work-holder receives a progressive or feed motion lengthwise of said buttonhole. When the work-holder reaches the limit of the aforesaid feed motion, the vibration of the needle-bar is stopped andthe .60 work-holder receives a reciprocating motion lengthwise of the buttonhole, and simultaneously therewith a progressive motion crosswise'of the buttonhole, whereby one end of said buttonhole is barred by stitches laid as 'above set forth. When said end is barred,

the operation of bindingis repeated, the direction of the progressive feed motion of the work-holder lengthwise of the buttonhole being reversed,.and when the opposite edge is bound the barring operation is repeated, the direction o'fthe progressive feed motion of the Work-holder crosswise of the buttonhole being also reversed, the parts being again in the position from which they started, as fully described in the patent above referred to.

I In Figs. 1 to 5, G indicates the bed-plate of r the machine; 10, the main driving-shaft,which has its bearings in the overhanging machinearm and imparts to the needle-bar N its vertical reciprocating motion; w,the shaft which imparts to the needle-bar frame N its vibrating motion, and e the stop-bar, carrying at its outer or left end a suitable stop-piece (2 adapted to engage the needle-bar frame and The stop-bar is actuated periodically through a two-armed lever 6 having its fuloru m below the bed-plate G, Figs. 2 and 3, the lower arm 6 of which lever carries a roller e in the path of cam'pi'ojec- 9o tions 0 on the upper face of the feed-wheel 6 Fig. 5. The feed-wheel 0 receives progressive or feed motion from a pawl 06 on a pawlarm a pivoted to a guide-slide a connected with a link a that is reciprocated bya lever 5 a, which latter receives a continuous vibrating motion from a cam-grooved sleeve a onthe external shaft w, that vibrates the needle-bar frame N The feed-Wheel c has in its upper face a suitable cam -groove 0 the aforesaid cam projections a", cam projections (2 and an annular groove 0 the inner face of the outer wall of which is provided with graduallydeepening recesses h h, said grooves being formed as hereinafter described.

The work-holder D comprises a slide 61 that has motion lengthwise of the bed-plate or bnttonhole in suitable ways 01 in a crossslide h below said bed-plate, which crossslide has mot-ion crosswise of the bed-plate in or on guides h 71 and to slide (1 is pivoted the cloth-clamp or clamping-lever, which is held to its work by a coiled springinterposed between its left arm and the slide d To this slide d is also secured a plate (1, that has near its left end a transverse slot (P, and to said plate is adj ustably secured a smaller plate (1 in which is formed a transverse slot d similar to slot 01 On its under side the slide (1 has a post U, which projects through a longitudinal slot in the cross-slide h, by means of which post the slide d is connected with the aforesaid feedgroove 0 in the feed-wheel 0 To the cross-slide h is secured a pin h, which carries a roller, and at a suit-able point or diametrically opposite pin h there is a second pin h, which also carries a roller and is secured to an arm 34, adjustablelongitudinally of the bed-plate by means of a binding-screw passing through a suitable slot in said arm and screwing into said bed-plate.

The reciprocating motion hereinabove ref erred to is imparted to the work-holder slide d from a lever F, fulcrumed atf to the machine-arm, said lever F receiving a continuous vibratory motion from a sleeve f having a suitable cam-groove f which acts upon the arm f of said lever F. The armf of leverf is connected bya link f with the free end of a lever f, arranged transversely of the bed-plate, to which the opposite end is fulcrumed, and said lever has a longitudinal slot adapted to register with one or the other of the two slots 61- d in plate don slide 01 In a suitable sleeve 6' is loosely guided a pin (5, held to the face of the feed-wheel c by a spring, Fig. 4, in the path of the projections e e thereon and hereinbefore referred to, which projections periodically lift the pin through the slot in lever f into one or the other of the two slots d (1 thereby coupling the work-holder D with lever f, whereby said Workholder is reciprocated lengthwise of the bedplate and buttonhole. The progressive motion in one direction crosswise of the bed-plate is imparted to the work-holder D, as heretofore stated, from the lower slide h acted on by springs g 9", that tend to move the same in one direction and through the pin it on said slide and one of two recesses h in the inner face of the outer flange 0 of the groove 0 v in the feed-wheel 0 above referred to. The said slide is moved in an opposite direction or against the stress of its springs 9 through its said pin it and the other recess h. These recesses 72 are formed in the inner face of flange 0 at diametrically opposite points by diverging segments relatively to the axis of rotation of the feed-wheel, forming reverse inclines, so that as the feed-wheel revolves in the direction of arrow, Fig. 2, the pin it rides along the outward incline from w to an of one recess h, allowing the springs g to move the slide it grad ually across the bed-plate G. When, on the other hand, the pin it rides along the reverse or inward incline from as to a: of the other recess 72, it will be moved in an opposite direction or against the stress of springs g.

All of the mechanisms hereinabove described are in their general organization and operation the same as the corresponding mechanisms described in the aforesaid patent of Julius Gutmanmwith such exceptions as are fully pointed out herein.

The progressive feed motion lengthwise of the bed-plate'and buttonhole is imparted to the work-holder, as stated, from the eccentric portions of the cam-groove c in feed-wheel 0 through the medium of a lever b, pivoted to the post 6 hereinabove referred to, on the under side of the work-holder slide at, which lever b is pivoted to a lever b fulcrumed on the under side of the bed-plate at b Fig. 3, and carries the pin b, that projects into the aforesaid cam-groove 0 This mode of connecting the work-holder with the feed-wheel simplifies the mechanism materially.

The lever 19 has a segmental slot 12 through which and the fork of a clamp b passes the pin b", by means of which lever 19 is connected with lever b the clamp I) being clamped to lever b by means of a screw b whereby the amplitude of the progressive feed movements of the work-holder can bevaried.

In barring a buttonhole end the vibration of the needle-bar, as has been stated, is stopped, while the work-holder receives a reciprocating motion lengthwise of the bedplate and buttonhole through instrumentalities hereinabove fully referred to and at the same time a progressive motion crosswise of the bed-plate through instrumentalities also fully described. During the operation of barring the pin b lies in one of the concentric portions of the cam-groove c in feed-wheel c and in order that the work-holder may reciprocate lengthwise of the bed-plate appliances have to be provided whereby said workholder is uncoupled from the feed-wheel during the operation of barring and again coupled theretouduring the binding operation, as describedjin the patent of J. Gutmann above referred to. This involves rather complicated mechanism, and one of the objects of this invention is to dispense with said coupling devices. To this end, and as more clearly shown in Figs. 6 to 10, we use a feed-disk 0 provided with the cam-groove a which disk and the circular flange e on feed-wheel 0 form the circular groove 0 above referred to. The disk 0 is conn'ected with the feedwheel 0 by means of guide-rails c, seated in parallel slots on opposite sides of the axis of said wheel, in which slots said rails are free to reciprocate, the slots and rails being preferably made with their sides converging upwardly to prevent vertical displacement, as shown in Fig. 7. The disk 0 has an oblong axial aperture 0 through which the hub c of the feed-Wheel passes, so that said disk can reciprocate on said hub.

It is obvious that when the work-holder slide (1 is reciprocated as described the pin b on lever b, which, as above stated, lies in one of the concentric portions of the camgroove 0 and feed-disk 0 will cause the latter to reciprocate with the pin, together with the lever Z), while said lever b merely vibrates on its pivot Z).

The disk 0 and feed-wheel c are coupled and uncoupled by means of spring-actuated latches c and c, pivoted to the upper face of the said feed-wheel on opposite sides of the hub thereof, and work in recesses c in the under face of disk 0 Fig. 9, the springs for said latches tending to throw them outwardly, the free end of said springs having bearing on the inner wall of the recesses 0' (See Figs. 6 and S.) The latches c 0 have an opening c ,in the inner wall of which is formed a recess 4, into which project studs 0 on the under side of the disk 0 Figs. 6, 7, and 9, the opening 0 in said latches being of such a diameter as to admit of the reciprocation of the disk 0" when said latches are moved out of engagement with the studs 0. This is effected by the pin it on the lower slide M, and by the pin it on the under side of the bed-plate G, heretofore referred to, the arrangement being such that as soon as one edge of a buttonhole is bound the said pins will ride along the outer edge of the latches, which project into the aforesaid circular groove 0 in the feed-wheel, whereby said latches are moved inwardly out of engagement with the stud 0, at which moment the work-holder D d is reciprocated for the production of barring-stitches, and as soon as one end of the buttonhole is barred said rollers again move out of contact with said latches,

whereby they are again moved into engagement with the studs 0 by their springs 0 In Figs. 11 to 15 We have shown a modified and preferred construction of disk 0 and means for coupling the same to and uncoupling it from the feed-wheel 0 In this conconnected together by a slide-bar 0 having endwise motion in a transverse groove 2' in the upper face of the feed-wheel c and the part c is secured to said feed-wheel by means of screws 1 extending through transverse slots i of sufficient length to permit the twopart disk to reciprocate with the work-holder in the direction of arrow, Fig. 11, under the action of pin b on Work-holder slide 61 The two-part disk 0 0 is held against reciprocation by springs 2' i, secured to the feed-wheel, the stress of said springs being overcome by the power applied to the work-holder to re ciprocate the same,'which power is transmitted to the two-part disk by the aforesaid pin 1). In the upper face of the feed-wheel is formed a cam-groove t of the same shape as the camgroove 0 between the two parts (3 aud o of the two-part feed-disk; but at diametrically opposite points said groove is widened, as at 2' to enable the pin and its roller 1) on the work-holder carrier (i projecting into groove 0 to partake of the reciprocations of the work-holder.

Having thus described our invention, what We claim as new therein, and desire to secure byLetters Patent, is-

1. In abuttonhole-sewing machine,the com bination with stitch-forming appliances comprising a reciprocating and vibrating needlebar, the work-holder, a progressively-revolving teed-wheel, a cam-disk revolving with and reciprocating on said wheel, intermediate mechanism controlled by the cam-disk and imparting to the work-holder a progressive feed motion lengthwise of the buttonhole; of feed-changing appliances for changing the progressive motion of the work-holder lengthwise of the buttonhole to one crosswise thereof, and means for simultaneously reciprocatin g the work-holder lengthwise of the buttonhole and for stopping the vibration of the needle-bar, for the purpose set forth.

2. In abuttonhole-sewing machine,the combination with stitch-forming appliances comprising a reciprocating and vibrating needlebar, the work-holder, a progressively-revolving feed-wheel, a cam-disk revolving with and reciprocating on said wheel, intermediate connections controlled by the cam-disk and imparting to the Work-holder a progressive feed motion lengthwise of the buttonhole; of feedchanging mechanism for changing the progressive feed motion of the work holder lengthwise of the buttonhole to one crosswise thereof, a continuously reciprocating element, means for automatically connecting the same with the work-holder when its direction of feed is changed, and means for simultaneously stopping the vibration of the needle-bar, for the purpose set forth.

3. In a buttonhole-sewing machine,the combination with the work-holder, a progressively-revoluble feed-wheel, a feed-disk composed of two concentric parts forming between them a cam-slot, a bar connecting the parts of said disk and sliding in a rectilinear groove in the feed-Wheel, springs on said wheel having bearing on opposite edges of the cam-disk, and mechanism connected with the Workholder, one element of which mechanism is provided with a pin projecting into the aforesaid cam-slot; of means for reciprocating the Work-holder when the aforesaid pin passes into a concentric portion of the cam-slot in thecam-disk, and means for simultaneously imparting to saidwork-holder a progressive feed motion crosswise of the buttonhole, for the purposes set forth.

In testimony that we claim the foregoing as 

